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Investments and Advances - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Variable Interest Entity [Line Items]      
Sales and other operating revenues $ 196,913 $ 235,717 $ 155,606
Purchased crude oil and products 119,196 145,416 92,249
Accounts and notes receivable due from affiliated companies 1,480 907  
Accounts payable due to affiliated companies 591 709  
Affiliated Entity      
Variable Interest Entity [Line Items]      
Chevron's loan to affiliates 4,494 4,278 4,704
Sales and other operating revenues 13,623 16,286 10,796
Affiliated Entity | Oil and Gas, Purchased      
Variable Interest Entity [Line Items]      
Purchased crude oil and products $ 7,404 $ 10,171 $ 5,778
Tengizchevroil LLP      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 50.00%    
Chevron investment carrying value over underlying equity in TCO's net assets $ 80    
Principal balance $ 4,500    
Caspian Pipeline Consortium      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 15.00%    
Angola LNG Limited      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 36.40%    
Chevron Phillips Chemical Company LLC      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 50.00%    
Chevron Phillips Chemical Company LLC | Affiliated Entity      
Variable Interest Entity [Line Items]      
Chevron's loan to affiliates $ 387    
GS Caltex Corporation      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 50.00%    
Golden Triangle Polymers Project | Chevron Phillips Chemical Company LLC      
Variable Interest Entity [Line Items]      
Equity method investment, ownership percentage 51.00%